My apologies. My comment was intended for people who know how to cook, for whom "put about a tablespoon of fish sauce into your tomato sauce for pasta" would not be meaningless.
I read your entire comment, thanks. But you didn't write anything about trying it.
Also, why not reflect on the nature of fish sauce and the nature of tomato sauce? Does that give you any ideas about what ratio might be edible? Any constraints at all on what might be worth trying?